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Polar Geospatial Center (PGC) Seminar Series #2
Wednesday 26 August 2020, 00:00 - 13:00
Location Online

Polar Geospatial Center (PGC) Seminar Series #2: Dr. Anna Liljedahl, Woods Hole Research Center

"The Permafrost Discovery Gateway: A web platform to enable knowledge-generation from big geospatial data"

Wednesday 26th August 12-1pm central time US

In light of the Arctic and Antarctic field seasons cancellations and changes, the PGC is taking this opportunity to showcase some of our users’ remote sensing based techniques and research that may inspire or supplement any project changes others have experienced.

This summer and fall, we have invited some of our users to be guest Science Speakers. Join us to learn about the different efforts to utilize remote sensing in polar science.

Our second guest speaker is Dr. Anna Liljedahl at Woods Hole Research Center presenting “The Permafrost Discovery Gateway: A web platform to enable knowledge-generation from big geospatial data.”

Abstract: Permafrost thaw has been observed at several locations across the pan-Arctic in recent decades, yet the pan-Arctic extent and potential spatial-temporal variations in thaw are poorly constrained. Thawing of ice-rich permafrost can be inferred and quantified with satellite imagery due to the subsequent differential ground subsidence and erosion that in turn affects land surface cover. Information contained within existing and rapidly growing collections of high-resolution satellite imagery (Big Imagery) is here extracted across the Arctic region through a collaboration between software engineers, computer- and earth scientists. More specifically, we are a) developing geospatial data down to sub-meter resolution, and also b) enabling discovery and knowledge-generation through visualization tools. This cyberinfrastructure platform, the Permafrost Discovery Gateway (PDG), is being designed with input from users of the PDG, e.g. primarily the Arctic earth science community but also the general public. The PDG builds upon other NSF supported data management resources (Arctic Data Center and Clowder) and the Fluid Earth Viewer. The Fluid Earth Viewer, the first visualization tool implemented into the PDG, was initially created for the public to explore atmospheric and oceanographic visualizations and is here modified to support permafrost geospatial products, and a number of community built analytic tools to identify permafrost artifacts within satellite imagery. The effort also includes workflow optimization of remote sensing code for pan-Arctic sub-meter scale mapping of ice-wedge polygons from optical imagery. We are additionally actively engaging with the user-community to ensure that the PDG becomes useful, both in terms of the type of data contained within the PDG and the design of the visualization tools. The PDG has the potential to fill key Arctic science gaps, such as bridging plot to pan-Arctic scale findings, while also serving as a resource informing decisions regarding the economy, security, and resilience of the Arctic region.

Registration is open to the public.

The webinar will include an interactive Q&A session with our guest speaker and PGC staff, and a recording will be available on our website. We hope you take the opportunity to attend and ask questions you may want answered.

Webinar Details:

If you are a PGC User, use remote sensing techniques in your polar research and would like to become a guest science speaker, please contact Cathleen Torres Parisian at This email address is being protected from spambots. You need JavaScript enabled to view it. for more information.

The Polar Geospatial Center (PGC) is a research facility funded by the National Science Foundation.
PGC is a proud part of the University of Minnesota's College of Science and Engineering.

Wednesday 26 August 2020

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